Creasing and grooving are important preparations for processing into packaging, boxes, folding boxes and cartons. Creasing and grooving facilitate later assembly. The board can be bent easily along the creases, preventing tearing of the surface.
During grooving, so-called score lines and fold lines are created; these are later used as push-in flaps or retrieval openings during carton and box manufacture.
There is no weakening of the board material during creasing, rather, the material is displaced. Grooving, however, does weaken the material.